Stereochemistry of the reaction of Si–phenyl silenes with butadienes: elaboration of the silacycloadducts to provide a novel route to substituted lactones
作者:Mahesh J. Sanganee、Patrick G. Steel、Daniel K. Whelligan
DOI:10.1039/b404175e
日期:——
silacycles accompanied by variable amounts of competing ene, [2 + 2] and silene dimer by-products. The silacycles are formed with good chemo- and stereo-selectivity and provide access to diols and lactones via a phenyl-triggered Fleming-Tamao oxidation.
Silenes as novel synthetic reagents: identification of a practical method for silene generation and trapping
作者:Malcolm B. Berry、Russell J. Griffiths、Mahesh J. Sanganee、Patrick G. Steel、Daniel K. Whelligan
DOI:10.1039/b404166f
日期:——
The elucidation of a robust and reliable sequence for the generation of highly reactive transient silenes from simple aldehydes is described. The key step involves a silyl-modified Peterson olefination which critically depends on the presence of a sub-stoichiometric amount of soluble lithium salts (LiBr).